Food-preserving apparatus.



o. PI HALL* F00!) PIRESERVING APPARATUS.

APPLICATION FILED MAY I8. IQIB.

CLIN P. HALL, OF ATLANTA., GEORGIA.

roon-rnnsnnvrne APPARATUS.

` tenaces.

Specification of Letters Patent.

resented ren., ii, raie,

Application filed May 18, 1918. Serial No. 235,279.

' To all whom it 'may conce/m:

Be it known that I, OLIN P. HALL, of Atlanta, in the county of Fulton,and in the State of Georgia, have invented a certain new and usefulimprovement in Foodlreserving Apparatus, and do hereby declare that thefollowing is a full, clear, and exact description thereof.

The main object of my invention is economically and etliciently, andwithout. the use of ice, or other refrigerant to produce and maintain ina food container a lower temperature insumnier and a warmer one inwinter, than the normal, prevailing temperature, so injury to food fromhigh or low ternperatures may be prevented, and to this end my inventionconsists in the apparatus constructed substantially as hereinafterspecified and'claimed.

In the accompanying drawings- Figure 1 is a view, partly in section, andpartly in elevation, of illustrating one einbodiment of my inventiong'Fig. 2 is a detail View, in section, illustrating the employment ofalainp' for prometing the circulation of air.

Fig. 3, is a vertical section of another embodiment of my invention.

My invention makes use of the fact that a current or flow of air may becaused by the existence at difi'erent elevations, of strata or bodies ofair of diiferent temperatures, and, therefore, densities. I provide acabinet, 1.0, which-may have the general proportions and size of anice-using refrigerator', that has double walls to provide, preferably onall sides and top and bottom, an air space l1, that thus surroundscommodities placed on suitable shelves 12, and run to said air space, atthe bottom, a pipe 13 that leads from some point beneath the surface ofthe earth, say from a well 14, into which its lower end opens, and runfrom such air space, at the top, a -pipe 15 that is carried to someelevated oint, where it will be exposed to the direct heat of thestuncarried say above the roof of the house or building, and on the warmside thereof. The air in the upper part of the pipe 15, by reason of itshigher tempera turefwill flow upward and out of the pipe, and thusinduce a flow of colder air from the wel] up through the pipe 13, andthrouglrthe 'air' space 11, in the cabinet, around the articles ef foodtherein, and producing and maintaining m summer time a'lower temperaturethan that of the atmosphere in which the cabinet stands, yet therel isno contact with the food of theair flowing from the cellar, well, orother lcnv place.

To assure an adeqnatesupply of fresh air to the well, it is providedwith a grated top or cover 16, and to enable Athe inlet end of the wellpipe 13 to be as low down as possible, with wells having a fluctuatinglevel of water, said pipe has a vertically movable, telescopic section130 that rests at its bottom upon a float 17 on the water in the well,which rises and falls with the changing level of the water and thusmaintains the air inlet end of said section always the same distanceabove the water.

In winter, or cold weather, the heavy cold outside air, sinking into thewell will force warmer air at the bottoni thereof up through lthe airspace 11, and up, and out of the pipe l5 and thus maintain in such airspace a supply of warmer air than the normal, and so save the cabinetcontents from the hurtful effects of excessively low temperatures.

Ordinarily, the flow of air will proceed automatically, but to providefor the contingency of the existence of climate or tem-- peratureconditions that prevent automatic action, a by -pass or branch pipe 1Smay be run from the eduction pipe 15 to a chimney flue, F, to utilizeany draft in the latter from thc use of a stove or furnace, a damper 19being employed to open and close the passage to said flue F; or as shownin Fig. 2, the pipe 15, just above the cabinet 10, may have anenlargement or chamber 2O for holding1 a kerow seno lamp 21 to raise thetemporal ure and in* duce the draft. Said chamber 20 is in a bypasscontrolled by a. damper 200 and the pipe 15 has a damper 150. A suitabledoor to give access to the lamp, is, of course, provided for the chamber20. l

The cabinet 10, has a door or doors for giving access to its interior.

YWhen the connection is made with a cellar or other subterranean place,the incidental effect of the operation is to ventilata and purify thesame. Y

As shown in F'g. 3, the connection between the cabinet 10 and theeduction pipe or pipes may be a section of flexible tubing or hose 22,and the pipe leading from the well may also be flexible tubing or hose23, so as to enable the cabinet readily to be moved about withoutdisturbing the pipe connections and also Eli simplifying and lesseningthe cost of installation.

What I claim is:

l. The combination of a food container having a food holding chamber andan air space contiguous to and isolated from the chamber, and pipesthat, respectively, lead to said air space from a low point of cold airsupply and lead from said air space to be eX- posed to Conditionstending to produce an upward flow of air therein, whereby a cir eulationof air through Said space is produced:

2. The combination of a food container having a food holding chamber andan air space contiguous to and isolated from the chamber, and pipesthat, respectively, lead to said air space from a 10W point of cold airsupply and lead from said air space to be exposed-to conditions tendingto produce an upward low of air therein, whereby a cir-` GLEN P. HALL.

